Before anyone asks, yes, the first two games and maybe the others, are worth every cent you will pay for these. The graphics are horrible in comparison to today's standards and they weren't really good back then. I go back and play the first two ever couple years still because they are so damn addicting still. If you can get past the ugly interface, you will get to play one of the most interesting and unique turn based strategy games you've ever played.
For what it's worth, I recommend these wholeheartedly. Some of my favorite games of all times and deftly balances turn based combat, resource management, and base building/RPG elements all at the same time. It's a wonderful mix that I wish would be emulated with modern graphics, but alas, we're stuck with this low res crap. But the birght side is, everything in the combat sections of the game is destructible. This alone, besides all the other fantastic aspects of the game, make it worth playing.